Effects of Post-Stroke Upper Extremity Assistance
Study Details
Study Description
Brief Summary
The purpose of this study is to quantify the improvement of post- stroke individuals' ability to move their arms during and after robot assisted therapy.
While researchers know that robot assisted therapies improve motor performance over the course of weeks, they do not know how motor performance is affected over the course of minutes or hours. A better understanding of how robot assisted therapies affect motor performance on short time scales may help us to prescribe more effective therapy doses to maximize motor recovery after neurological injury.
The study will allow us to obtain a detailed understanding of the performance of the device as described above.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
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N/A |
Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| Experimental: Stroke Survivors Stroke survivors with upper extremity motor impairments |
Device: Compliant Passive Arm Support
The device is a mechanical device that consists of two linkages, elastic bands, a commercial posture brace, and a hook-and-loop fastener. The design of the device, with several compliant elements, ensures that one device fits many without joint alignment concerns. No motors or other actuators add energy into the system, meaning that it is stable.
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Outcome Measures
Primary Outcome Measures
- Action Research Arm Test (ARAT) Action Research Arm Test (ARAT) [Change in ARAT score from baseline (without the device) assessed after approximately 60 minutes of use with the device.]
The ARAT is a 19 item measure divided into 4 subscales (grasp, grip, pinch and gross movement) and arranged in order of decreasing difficulty, with the most difficult task examined first, followed by the least difficult task. Task performance is rated on a 4-point scale, ranging from 0 (no movement) to 3 (movement performed normally). ARAT measures activities of daily living, coordination, dexterity, upper extremity function.
Secondary Outcome Measures
- Reachable Workspace [Change in from baseline (without the device) of Range of Motion assessed after approximately 60 minutes of use with the device.]
Participants will be instructed to individually flex and extend the elbow and shoulder to trace the largest possible circle that they can reach while keeping the hand and elbow raised to the height of the shoulder while the motion of the arm is tracked with motion capture. This protocol was originally developed by Sukal et al (2007); to asses post-stroke motor abilities. A larger workspace area indicates fewer upper extremity motor impairments.
Eligibility Criteria
Criteria
Inclusion Criteria:
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greater than 6 months post-stroke
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passive abduction to 90 degrees at shoulder
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reduced active (retro)flexion/extension at shoulder when abducted at 90 degrees
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reduced active flexion/extension at elbow
Exclusion Criteria:
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unable to give informed consent
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unable to comprehend and follow instructions
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have a condition (other than stroke) affecting sensorimotor function
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show evidence of unilateral spatial neglect
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unable to sit in a chair without armrests for 2 hours
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | Stanford University CHARM Lab | Stanford | California | United States | 94305 |
Sponsors and Collaborators
- Stanford University
Investigators
- Principal Investigator: Allison Okamura, Stanford University
Study Documents (Full-Text)
None provided.More Information
Publications
- IRB-61540
- SNI-BI1-02